AN ENUMEEATION OF CULTIVATED FERNS. 



275 



,like. Sporangia subglobose, trilobed, vertically trivalved, 

 solitary in the axis of the bract-like leaves. 



Genus 158. Portion of fertile frond, natural size; spore-case 

 enlarged. No. 1 . 



1. P. triquetrum, Sw. ; Schk. Fil. t. 165 6 ; Hook. Gen. Fil. 

 t. 87; Lodd. Cab. t. 1916. Lycopodium nudum, 

 Linn. Tropics and sub- tropical regions of both 

 hemispheres. 



159. LYCOPODIUM, Lwm. 



or 



